Subject Code & Name: EI25C01 – Electrical Machines and Drives
Regulation: R-2025
Semester: III (Third Semester)
Branch: B.E. Electronics and Instrumentation Engineering (EIE) / B.E. Instrumentation and Control Engineering (ICE)
Credits / L-T-P: 3 Credits | L-T-P: 3-0-0
Course Objectives
- This course provides foundational knowledge of AC and DC machines, including their construction, operation, testing, and control.
- It introduces special machines and power electronic devices with an emphasis on switching characteristics.
- The course also covers DC and AC drives, their control strategies, and integration using power electronic circuits.
Full Unit-wise Syllabus
Unit I – DC Generator
Construction of D.C. Machines – DC Generator: Principle of operation, Characteristics.
Activities: Simulate the open circuit characteristics of DC shunt generator, Load characteristics of DC shunt generator using simulation software.
Unit II – DC Motor
Principle of operation, Types, Torque equation, Characteristics, Speed Control.
Unit III – Transformers
Transformer – Principle – Theory of ideal transformer – EMF equation – Construction details of shell and core type transformers – Regulation and Efficiency - Tests on transformers.
Activities: Group seminar on no-load and load test on transformers.
Unit IV – Three-phase Induction Motor
Construction and principle of operation, Torque and torque-slip characteristics, Efficiency, Applications, Starting methods, Speed control of induction motor.
Unit V – Power Semiconductor Devices and Characteristics
Operating principle and switching characteristics: Power diodes, Power BJT, Power MOSFET, IGBT, SCR, TRIAC.
Unit VI – Drives And Control
Static and Dynamic equations of DC and AC machines – Electrical braking – Rectifier and chopper control of DC drives – Open loop and Closed loop schemes for DC and AC drives. – Servo drives VFD.
Course Outcomes (COs)
- CO1: Explain the construction, principle of operation, and characteristics of DC machines.
- CO2: Analyze the performance and speed control of DC motors and generators.
- CO3: Analyze the operation, characteristics, and performance of three phase induction motors.
- CO4: Apply power semiconductor devices and analyze DC and AC drives with control strategies.
Assessment Pattern (Quick Note)
- Weightage: Continuous Assessment 40% | End Semester Examinations 60%
- Internal methodology: Assignments (20%), Solution to application-oriented problems using software (20%), Review of GATE questions (20%), Internal Examinations (40%)
Source: Official Anna University – B.E. Electronics and Instrumentation Engineering R-2025 Curriculum
Last Updated: September 2026
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